<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <p v-if="flag">这是被v-if控制的元素</p>
        <p v-show="flag">这是被v-show控制的元素</p>

        <br>

        <div v-if="type === 'A' ">优秀</div>
        <div v-else-if="type === 'B' ">良好</div>
        <div v-else-if="type === 'C' ">一般</div>
        <div v-else >差</div>

    </div>
    <script>
        const vm = new Vue({
            el:"#app",
            data:{
                //如果flag为true则展示被控制的元素 false则隐藏被控制的元素
                flag:true,
                type: 'B'
            },
            methods:{

            }
        })
    </script>
</body>
</html>